Co-linear anti-Stokes generation from a CW Raman laser

Summary form only given. Using the high optical power build-up within a high finesse cavity (HFC), two-photon nonlinear processes have recently been studied with low power CW lasers. In particular, stimulated Raman scattering has been used to construct non-resonant CW Raman lasers with high efficiencies and pump thresholds on the order of 1 mW. Although this study was limited to Stokes emission, parametric processes such as coherent anti-Stokes scattering are also possible. In the pulsed laser regime, anti-Stokes commonly emits in ring patterns due to phase matching requirements. More recently, however, co-linear emission of pulsed anti-Stokes was observed in solid H/sub 2/ through self-induced phase matching. We report the observation of co-linear CW anti-Stokes emission from a CW Nd:YAG-pumped Raman laser in H/sub 2/ gas.